I've been conversing with one of my friends, who is a longtime IRCOP and who recently switched over to the beta of XP 64bit. Annoyingly, he discovered that, because mIRC uses a few 16 bit calls (while XP 64 bit supports 32 bit calls, 16 bit is totally non-functional), which prevented its use. So, I would like to suggest that at least a fully 32 bit version of mIRC be created eventually (perhaps even a seperate, fully 64 bit version)